The bottom line (no pun intended!) is that there’s no single best way to end an email — it varies depending on the recipient, whether it’s formal or informal; business or personal, as well as your own personality and the overall tone of the industry you work in. Appropriate language at an investment bank is very different than it is at a recording studio. Make an effort to be sincere and warm without overdoing it; formal without being stiff and don’t end with phrases like ‘Talk Soon’ unless you actually expect to talk soon.